Verify apk file downloaded?

It seems that this has wrongly been marked solved hence my findings is that original poster’s first paragraph is the same question I have: how do you verify the individual APKs downloaded is yet unsolved I attempted to use the same signing key used to verify the FDroid app and it does not check out therefore if this was marked solve in the past @m999 's post would suggest that given the answer which was marked solved by @Licoan_kter did indeed use the same PGP signing key that the Fdroid APK was signed with however now my findings indicate that it does not because it does not check out.